// Read an INI file into easy-to-access name/value pairs.

// SPDX-License-Identifier: BSD-3-Clause

// Copyright (C) 2009-2020, Ben Hoyt

// inih and INIReader are released under the New BSD license (see LICENSE.txt).
// Go to the project home page for more info:
//
// https://github.com/benhoyt/inih

#include "INIReader.h"

#include <algorithm>
#include <cctype>
#include <cstdlib>

#include "ini.h"

using std::string;

INIReader::INIReader(const string &filename)
{
    _error = ini_parse(filename.c_str(), ValueHandler, this);
}

INIReader::INIReader(const char *buffer, size_t buffer_size)
{
    string content(buffer, buffer_size);
    _error = ini_parse_string(content.c_str(), ValueHandler, this);
}

int INIReader::ParseError() const
{
    return _error;
}

string INIReader::Get(const string &section,
                      const string &name,
                      const string &default_value) const
{
    string key = MakeKey(section, name);
    // Use _values.find() here instead of _values.at() to support pre C++11
    // compilers
    return _values.count(key) ? _values.find(key)->second : default_value;
}

string INIReader::GetString(const string &section,
                            const string &name,
                            const string &default_value) const
{
    const string str = Get(section, name, "");
    return str.empty() ? default_value : str;
}

long INIReader::GetInteger(const string &section,
                           const string &name,
                           long default_value) const
{
    string valstr = Get(section, name, "");
    const char *value = valstr.c_str();
    char *end;
    // This parses "1234" (decimal) and also "0x4D2" (hex)
    long n = strtol(value, &end, 0);
    return end > value ? n : default_value;
}

double INIReader::GetReal(const string &section,
                          const string &name,
                          double default_value) const
{
    string valstr = Get(section, name, "");
    const char *value = valstr.c_str();
    char *end;
    double n = strtod(value, &end);
    return end > value ? n : default_value;
}

bool INIReader::GetBoolean(const string &section,
                           const string &name,
                           bool default_value) const
{
    string valstr = Get(section, name, "");
    // Convert to lower case to make string comparisons case-insensitive
    std::transform(valstr.begin(), valstr.end(), valstr.begin(), ::tolower);
    if (valstr == "true" || valstr == "yes" || valstr == "on" || valstr == "1")
        return true;
    else if (valstr == "false" || valstr == "no" || valstr == "off" ||
             valstr == "0")
        return false;
    else
        return default_value;
}

bool INIReader::HasSection(const string &section) const
{
    const string key = MakeKey(section, "");
    std::map<string, string>::const_iterator pos = _values.lower_bound(key);
    if (pos == _values.end())
        return false;
    // Does the key at the lower_bound pos start with "section"?
    return pos->first.compare(0, key.length(), key) == 0;
}

bool INIReader::HasValue(const string &section, const string &name) const
{
    string key = MakeKey(section, name);
    return _values.count(key);
}

string INIReader::MakeKey(const string &section, const string &name)
{
    string key = section + "=" + name;
    // Convert to lower case to make section/name lookups case-insensitive
    std::transform(key.begin(), key.end(), key.begin(), ::tolower);
    return key;
}

int INIReader::ValueHandler(void *user,
                            const char *section,
                            const char *name,
                            const char *value)
{
    if (!name)  // Happens when INI_CALL_HANDLER_ON_NEW_SECTION enabled
        return 1;
    INIReader *reader = static_cast<INIReader *>(user);
    string key = MakeKey(section, name);
    if (reader->_values[key].size() > 0)
        reader->_values[key] += "\n";
    reader->_values[key] += value ? value : "";
    return 1;
}